| China Ventureprise Limited | Extraterritorial | 2005 |
| Church of the Living GOD, Westbury | Other services | 2009 |
| Cipw Ltd | Arts & recreation | 2023 |
| Circle. Ibiza Ltd. | Information & communication | 2019 |
| Circle. Music Group Ltd. | Information & communication | 2019 |
| Circle. Recordings Ltd. | Manufacturing | 2019 |
| Circular Office Group Ltd | Wholesale & retail | 2025 |
| Citaglen (Signs) Ltd | Manufacturing | 1982 |
| CJ Kaye Property Ltd | Real estate | 2018 |
| Cjmj Limited | Real estate | 2022 |
| CJS Plastering & Rendering Limited | Construction | 2014 |
| CKG Taverns Limited | Hospitality | 2024 |
| Cladall Limited | Construction | 2009 |
| Clay & Co. Facilities Group Ltd | Administrative & support | 2021 |
| Clear View Engagements Ltd | Information & communication | 2026 |
| Clearsky Communications Ltd | Information & communication | 2019 |
| Clearsky IT Limited | Information & communication | 2015 |
| Clearwood (Dilton Marsh) Limited | Other services | 2010 |
| Clucking Happy Limited | Wholesale & retail | 2024 |
| CMC Property Limited | Real estate | 2003 |
| Co Living South West Ltd | Real estate | 2018 |
| Cocoon Cleaning Company Limited | Administrative & support | 2024 |
| Cole Gunning Financial Advice Ltd | Financial services | 2025 |
| Consultcore Analytics Ltd | Education | 2023 |
| Content Canvas Ltd | Information & communication | 2025 |
| Corethentic Ltd | Professional & scientific | 2019 |
| Corner Food Shop Limited | Hospitality | 2015 |
| Coronaclear Limited | Professional & scientific | 2020 |
| Cosi (Westbury) Limited | Hospitality | 2019 |
| Cradock Tractors Limited | Wholesale & retail | 2020 |
| Cresswell Engineering Services Limited | Manufacturing | 2006 |
| Crewed IT Limited | Information & communication | 2019 |
| Cskills Ltd | Information & communication | 2025 |
| Cunningham and Othen of Oxford Limited | Information & communication | 1998 |
| Cura Pharma Services Ltd | Wholesale & retail | 2022 |
| Curry Capital Ltd | Real estate | 2023 |
| Curtis Centre Management Ltd | Real estate | 2025 |
| Custom Aspect Ltd | Construction | 2015 |
| Custom Piling Ltd | Construction | 2024 |
| CVC Building Services Limited | Construction | 2014 |
| CVC Construction Ltd | Real estate | 2020 |
| Cyber ASK Ltd | Information & communication | 2023 |
| D.Derrick Carpentry Ltd | Construction | 2021 |
| Daiml Limited | Information & communication | 2021 |
| Dale Welding Contractors Limited | Manufacturing | 2018 |
| DAN Matthews Electrical Limited | Construction | 2023 |
| Dance Call Limited | Administrative & support | 2005 |
| Daniel James Building Contractors Ltd | Construction | 2024 |
| Darrland Ltd | Wholesale & retail | 2026 |
| Datanetex Limited | Information & communication | 2008 |
| David L Goodman Horticulture Ltd | Administrative & support | 2023 |
| DDH Menopause Clinic Ltd | Health & social care | 2025 |
| DE Creative Emporium Limited | Arts & recreation | 2023 |
| Dear Beany Limited | Wholesale & retail | 2025 |
| Demaine Artisan Limited | Hospitality | 2023 |
| Dentons Directories Holdings Limited | Information & communication | 2015 |
| Dentons Directories Limited | Information & communication | 1989 |
| Development Solutions (UK) Limited | Real estate | 2011 |
| Dezen Stays Ltd | Real estate | 2025 |
| Diamond Car Wash & Valeting Ltd | Administrative & support | 2021 |
| Diamond Hand Car Wash Westbury Limited | Administrative & support | 2019 |
| Digger Bidder Ltd | Information & communication | 2012 |
| Dividend House Management Limited | Real estate | 2017 |
| DL Business Finance Limited | Financial services | 2021 |
| DMS Transport Holdings Limited | Transport & logistics | 2024 |
| Domestic Help Services Ltd | Administrative & support | 2020 |
| Door Loading Services UK Ltd | Manufacturing | 2008 |
| Dovely Care Ltd | Health & social care | 2020 |
| Dowd Engineering Ltd | Wholesale & retail | 2025 |
| DP Infinity Limited | Information & communication | 2018 |
| DR Edges Market Tavern Ltd | Hospitality | 2025 |
| DR Edwards Aesthetics Ltd | Health & social care | 2019 |
| Dreamworks Beds Limited | Manufacturing | 2003 |
| Drummonds Business Services Limited | Extraterritorial | 2012 |
| DUN HUA Limited | Hospitality | 2020 |
| E J W Builders Ltd | Construction | 2014 |
| E. G. Martin Limited | Wholesale & retail | 1965 |
| Earp Consulting Ltd | Professional & scientific | 2008 |
| East Wing Compassionate Community CIC | Health & social care | 2019 |
| Easyspace.Construction Ltd | Construction | 2015 |
| EB Mann Ltd | Professional & scientific | 2026 |
| ECU Decode Limited | Wholesale & retail | 2011 |
| Edge Energy Limited | Professional & scientific | 2009 |
| Ediboutique Ltd | Wholesale & retail | 2025 |
| Edwards Collision Investigation Services Ltd | Professional & scientific | 2012 |
| EEA Ltd | Hospitality | 2026 |
| EJW Construction Southwest Limited | Construction | 2023 |
| EKF Trading Limited | Financial services | 2021 |
| Elba Developments Limited | Construction | 2023 |
| Elba Flooring Limited | Wholesale & retail | 2026 |
| Elba King Homes Limited | Real estate | 2024 |
| Elba Property Group Limited | Financial services | 2025 |
| Elba Rentals Limited | Real estate | 2025 |
| Elite CFO Services Limited | Professional & scientific | 2023 |
| Elite Financial Planning Limited | Financial services | 2002 |
| Elmill Ltd | Manufacturing | 1996 |
| Emerald Florence Beauty and Aesthetics Ltd | Other services | 2019 |
| Emerald Florence Limited | Other services | 2018 |
| Energy by Tessa Ltd | Other services | 2002 |
| Equality in Mind Ltd. | Health & social care | 2019 |